George t



(No Model.)

GJT. REISS.

LATHE.

No'. 430,088. Patented June 10, 1890.

Witnesses Y Inventor WWW.%%

Attorney UNITED STATES PATENT OFFICE.

GEORGE T. REISS, OF HAMILTON, OHIO, ASSIGNOR TO THE NILES TOOL -WORKS, OF SAME PLACE.

LATHE.

SPECIFICATION forming part of Letters Patent No. 430,088, dated June 10, 1890.

Application filed April 19, 1890- Serial No. 348,677- (No model.)

T0 aZZ whom itmay concern:

Be it known that I, GEORGE T. REIss, of Hamilton, Butler county, Ohio, have invented certain new and useful Improvements in Lathes, of which the following is a specification.

This invention pertains to improvements in that class of lathes designed for operation on the driving-wheels of locomotives, and has special reference to such improvements as will fit such lathes for the turning or re-turn-.

ing of the crank-pins projecting outwardly from the driving-wheels.

My improvements will be readily understood from the following description, taken in connection with the accompanying drawings, in which- 1 Figure 1 is'a rear elevation of the bed and head-stock of an ordinary driving-wheel lathe provided with crank-pin-turning appliances exemplifying my present invention; Fig. 2, an end view of aportion of the head-stock, showing the spindles in vertical transverse section Fig. 3, a perspective View, on an enlarged scale, of the slide-rest for turning the crankpins; and Fig. 4 a side elevation of the end portion of the boring-bar employed in boring the crank-pin holes.

In the drawings, A indicates the bed of an ordinary driving-wheel lathe; B, the usual head-stock thereon; O, the usual face-plate intended to be driven in the ordinary way and by the ordinary means; D, the usual adjustable center spindle at the axis of the faceplate; E, the usual lathe-center carried by this center spindle and serving to engage the center of the axle on which the driving-wheels are fixed; F, the usual hand-wheel for adjust= ing the center spindle endwise; G, a guide-bed or bolting-seat upon one face of the headstock adapted to receive and permit the radial adjustment of the hearing which is to carry the boring-bar; H, the bearing of the boring-bar, secured to the guide-bed and arranged for adjustment thereon to and from the center spindle, so as to suit different throws of the cranks, the axis of this bearing being of course parallel with the axis of the face-plate, these dispositions being as usual; J, the usual boring-bar carried by the adjustable bearing and arranged for rotation therein, and arranged, also, for a longitudinal feeding motion therein, the inner end of this boring-bar protruding through the usual slot in the face-plate, so that the inner end of the bar may operate in the crank-pin hole in the driving-wheel supported in the lathe; K, the usual driving-pulley geared to the b0ring-bar and exemplifying an ordinary .system for giving rotation to the boringbar; L, the usual feed-wheel engaging the feed-screw of the boring-bar and exemplifying ordinary hand-feed devices'for giving the longitudinal feed motion to the boring-bar; M, a slide-rest secured to the inner end of the boring-bar and having its guideway projecting inwardly beyond the inner end of the boring-bar and parallel with the axis of the boring-bar, but disposed outwardly some distance radial from the axis of the boring-bar; N, a tool-holder fitted to slide along the guideway of the slide-rest and be actuated by a feed-screw in the slide-rest; O, a tool secured in the tool-holder and projecting inwardly therefrom, so that its inner or cutting end may, as the boring-bar revolves, sweep in a circle corresponding with the desired diameter of crank-pin to be produced; P, a starwheel on the end of the feed-screw of the slide-rest nearest the face-plate; Q, a stud projecting from the face of the face-plate and adapted to be engaged by the star-wheel as the boring-bar revolves; R, a center projecting from the inner end of the boring-bar; S,

Fig. 4, the usual set-screw in the end of the boring-bar for securing the boring-tool in the boring-bar when the boring-bar is to be employed for purposes of boring; T, (same figure) the transverse tool-holding mortise in the end of the boring-bar to hold the boringtool under the circumstances just mentioned;

U, the feed-screw of the slide-rest, rotated by means of the star-wheel and serving to give the longitudinal feed movement to the toolholder N, and V the usual detent screw or pin mounted upon the lathe-bed and engaging the periphery of the face-plate and serving to lock the face-plate against rotation when the boring-bar is being employed. It is to be understood, of course, that the lathe for the set-screw.

bofing arrangement, such alternative,

construction being about equally common.

Assume a locomotive-axle with two driving-wheels attached to be mounted in the lathe in the usual way and that one of the crank-pin holes is to be bored. In such case the driving-wheel will be dogged,as usual-, to v the face-plate of the latheand the detent V will engage the face-plate so as to lock it against rotation and hold the driving-wheel firmly in such position that the axis of the desii-ed"rai'1k-pi'n hole will coincide 'angularly with theaxis'of the boring-bar. The slide-rest Will be entiielyo'mitted from the boring-bar f and the boring-bar will have the usual borii'i'g-tool new in the 'm'o'rti's'e Tby the set-screw s. The tearing it will then be adjusted ra- 'dial'ly to bring the axis of the boring-bar the proper radial distance from the axisfo'f th'ej' driving-Wheel, The 'crankapin hole is then;

bored in the usual manner.

Assume now that insteadof Wishing to bote a crank-pin hole in the locomotive-driver we; Wish to re-turn ac'rankpin already found in the 'driving wheel. In this case the boring "bar instead 0t being employed as a boring,

implement is to be employed as a turning, implel'n'e'n't. The boring-tool will'b'e removed from the mortise T, the set-screw S Will'be, removed, and th'e center R will be substituted The slide-"rest will n'owbef Iclanfped firmly to "the end of the boring-bar. j

The boring-bar will then be adjustedendwi'se 'by manser it's 'u's'ual feedingappliances until the centerR'ta'kes a bearing in the'center of the crankpin, it being unde'rstoodyof course, that th'eproper adj ustments'havebeen'; made to secure'coincidence between theakis pin. The tool 'Ois now secured in the tool-' holder'with 'its'cutting' end'in proper relation tothesurface'of the'c'ran'kpin, and the tool may'be'longitudinally adjusted by hand by; turning the star-Wheel. The boring-bar is of the boring-barand the axis of the'cranlo;

then put into rotation the same as if for boring and the tool 0 will proceed to operate upon the periphery of the crank-pin,the longitudinal travel of the tool being effected by the engagement of the star-Wheel with the stud Q. During this operation the slide-rest structure is steadied by reason of the engagement of the center R with the center of the crank-pin. For short crank-pins, Where much overhang of the slide-rest is not involved, this center-steadying feature may be omitted,'and, if desired, the feeding, instead of being effected by the screw of the slidere'st, may be -efie'et'e'd by the usual feeding appliances of the boring-bar, the boring-bar being moved endwise to accomplish the feed.

I claim as my invention 1. In a driving-Wheel lathe, the coin-bination, substantially as set forth, with a headstock provided with a center, a center spindle, and a face-plate, of a dete'nt to lock the faceplate against rotation, a bearing mounted on the head-stock and adjustable to and from the 'axis thereof, a boring-bar carried by said heating and projecting through said face- :plate and provided with mechanism for rota-ti'n g and feeding it, a slide-rest moun-tedon the projecting end of the boring-bar, and a tool-holder mounted on said slide-rest.

2. 'In a driving-wheel lathe, the combination, substantially as set forth, with a head- 'endvvise beyond the same, a tool-holder mounted for longitudinal movement -on said slide-rest, and mechanism for feeding said tool-holderalongsaid slide-rest. I

I GEORGE T. REISS. Witnesses:

J. W. SEE, O. CRAWFORD. 

